geochemically การใช้

• Therefore, it is classified geochemically as alkaline rock.
• There are only a few thousand mineral species and 83 geochemically stable chemical elements combine to form them.
• The earliest eruptions, many of which were geochemically distinct from the later volcanism, as they contain amphiboles.
• Some microorganisms, called extremophiles, thrive in physically or geochemically extreme environments that are detrimental to most other life on Earth.
• Remote sensing techniques, specifically hyperspectral imaging, have been used to detect hydrocarbon microseepages using the spectral signature of geochemically altered soils and vegetation.
• Geochemically, carbonatites are dominated by incompatible elements ( Ba, Cs, Rb ) and depletions in compatible elements ( Hf, Zr, Ti ).
• Group 12 metals are geochemically with those elements that constitute the majority of the crustal mass, mercury ores can be highly concentrated considering the element's abundance in ordinary rock.
• Skeleton fossils unearthed in 1997 were age dated at about 3 million years using a technique that measured the changes in the Earth's magnetic field geochemically recorded within rocks found with the fossils.
• More recently, the various Watchung flows have been correlated to geochemically distinct layers within the Palisades sill, bolstering the theory that eruptions of the Palisades magma were responsible for the episodic flood basalts of the Newark Basin.
• However the Xiong'er volcanic belt does not match up well geochemically with either of these tectonic settings, but seems to have more of a mixture of the two which has caused much confusion about the origin of the belt.
• The thick sequences of volcano-sedimentary facies are present in North Wales ( as the Arfon Group ) and South Wales ( as the Pebidian Supergroup ) and are generally considered to be coeval but are geochemically distinct, showing acidic and basic qualities respectively.
• Previous explorations in the Wynbring area consisted of wide-spaced reconnaissance bedrock drilling by PIRSA that indicated the presence of a 30 kilometre-long zone of intermediate to ultramafic rocks adjacent to a major fault and geochemically anomalous in gold, nickel, chromium, platinum and palladium . ( PlatSearch, 2004 ).
• In July 2016, scientists reported identifying a set of 355 genes likely present in the Last Universal Common Ancestor ( LUCA ) of all organisms clostria as a basal clade in the 355 phylogenies examined, and suggest that LUCA inhabited an anaerobic hydrothermal vent setting in a geochemically active environment rich in H 2, CO 2 and iron.
• Geochemically, pegmatites typically have major element compositions approximating " granite ", however, when found in association with granitic plutons it is likely that a pegmatite dike will have a different trace element composition with greater enrichment in large-ion lithophile ( incompatible ) elements, boron, beryllium, aluminium, potassium and lithium, uranium, thorium, cesium, et cetera.
• Using the geochemically preferred Urey ratio of Ur = 1 / 3 and the geodynamically preferred cooling exponent of \ text { beta } = 1 / 3 the mantle temperature reaches the mantle solidus ( i . e . a catastrophe ) in 1-2 Ga . This result is clearly unacceptable because geologic evidence for a solid mantle exists as far back as 4 Ga ( and possibly further ).
• Research published in 2016, by William F . Martin, by genetically sequencing 6.1 million protein coding genes from sequenced prokaryotic genomes of various phylogenetic trees, identified 355 protein clusters from amongst 286, 514 protein clusters that were probably common to the LUCA . The results " depict LUCA as clostria as a basal clade in the 355 lineages examined, and suggest that the LUCA inhabited an anaerobic hydrothermal vent setting in a geochemically active environment rich in H 2, CO 2 and iron.